rumble



(N0 Model.) 2 Sheets-Sheet; 1.

A. O. RUMBLE. AMALGAMATOR.

No. 548,595. Patented 001;. 22, 1895.

ANDREW .GRRHAM,PHOTOUTNQWASUINGTDMHC.

(No Model.) 2 Sheets-Sheet 2.

A. 0. RUMBLE. AMALGAMATOB.

No. 548,595. Patented 055. 22, 1895.

ANDREW EGRMMM.PHOTU-UTHQWASHINGTQN. D

UNITED STATES PATENT Orr-1c.

ALEXANDER CARSON RUMBLE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE MIDAS GOLD SAVING MACHINERY COMPANY, OF SAME PLACE.

AMALGAMATO R.

SPECIFICATION forming part of Letters Patent No. 548,595, dated October 22, 189 5.

Application filed January 31, 1895. Serial No. 536,842. (No model.)

To all whom it iii/coy concern: This cylinder or barrel is constructed of an Be it known that I, ALEXANDER CARSON outer shell I), usually of sheet metal, an inner RUMBLE, a citizen of the United States, and a lining or amalgam-plate c,of copper, and an inresident of San Francisco, in the county of terposed filling or backingd. Thisinterposed San Francisco and State of California, have filling or backing may be of wood or other 55 invented certain new and useful Improvesuitable material; but I prefer that it shall merits in Amalgamators; andIdo declare the consist of layers of felt between which is following to be a full, clear, and exact descripplaced a composition capable of exciting a tion of the invention, such as will enable constant electrogalvanic action upon the cop- 10 others skilled in the art to which it apperper amalgam-plate. This composition pref- 6o tains to make and use the same, reference erably consists of a combination of sulphate being had to the accompanying drawings, and of zinc, copper, carbon, bitumen, and red lead. to letters of reference marked thereon, which The amalgam-plate is formed on its inner form a part of this specification. face with a series of rigid longitudinal wings I Figure 1 of the drawings is a representaor flanges D, which extend the entire length 6 5 tion of aside elevation of the invention. Fig. of said plate and which are of considerable 2 is a detail of a portion of amalgam-plate. breadth, projecting well toward the center of Figs. 3 and 4; are details of regulator-plate. the cylinder or barrel. The number of these Figs. 5 and 6 are details of plate G in close wings will depend upon the diameter of the 2c relation thereto. Fig. 7 is a cross-section on cylinder, a practical size for which I find to 70 line a: at, Fig. 1. Fig. 8 is a central cross-secbe about six feetin length and eighteen inches tion of cylinder-head. Fig. 9 shows flange on in diameter. In a machine of this size six or spout of hopper. Fig. 10 is an enlarged crossmore of the wings or flanges can be used. 1 section of cylindershell, lining or amalgamdo not, however, confine myself to any parplate, and filling or backing. ticular dimensions of the cylinder or number This invention has relation to certain new of the wings or flanges. These wings or and useful improvements in amalgamatingflanges are formed integrally with the lining machines; and it consists in the novel conor amalgam-plate by crimping the plate in struction and combination of parts, all as hercthe manner shown in Fig. 2, thus presenting o inafter described, and pointed out in the apan unbroken surface and avoiding rivets or pended claims. other fastenings.

The object of the invention is to providea Both ends of the cylinder or barrel are machine of the above-named character which closed, its receiving end being provided with will produce a mechanical action of pulp, a spouted hopper E, which communicates 5 sand, or other fine material containing free with the interior through the central portion gold upon the amalgamating-surface in such of the head, so that the cylinder or barrel a manner as to secure repeated contacts with may freely rotate. such surface without friction or scouring, and Near the discharge end there is provided an at the same time securing contact of the interior regulatorplate F, which consists of 40 lighter particles of floatgold and floured a central hub portion from which radiate a go mercury which persist in floating upon the number of arms or wings F, each of which surface of the water, and consequently canis formed with one straight edge fand one not he brought in contact with a horizontal curved or hooked edge f giving the end poramalgamating-plate. tions of said Wings a broad approximately- 5 Referring to the accompanying drawings, segmental form. Behind this plate F and in the letter A designates an elongated cylinder close relation thereto is placed a parallel or barrel, which is rotatably supported in plate G, of circular form, with a series of rasuitable bearings a a on a bed Z with its axis dial openingsgtherethrough. This plate G is inclined to the horizontal, the inclination be formed with an extended hollow axial per- 50 ing such that its receiving end is highest. tion H, which projects through the head of I00 the barrel or cylinder and forms the journal for the discharge end thereof. Extending through said hollow extension is a .rod h, which centers the plate F, and on the projecting end of which is a hand-wheelor other device whereby the relative position of the plate F to the plate G may be varied to regulate the discharge.

Beyond the plate G the interior of the cylinder or barrel forms a short chamber I, the discharge from which consists of a series of openings J through the periphery of the cylinder or barrel. K is a trough or other receptacle arranged to receive the discharge from said openings.

The axial extension H is journaled in a box L, which is made vertically slidable in its support, in order to provide for variable adjustments in the inclination of the cylinder or barrel, by means of an adjustingscrew H.

The cylinder'or barrel maybe rotated by any suitable means, such as the bevel gearring P, engaged by a pinion P on a drivingshaft R, provided with a differential pulley S.

To facilitate access to its interior the cylinder is provided with a hinged section T.

The spout of the hopper where it projects through the head of the barrel or cylinder is formed witha surrounding flange g, which turns in a corresponding groove y in a projecting boss Y of said head. This end of the barrel also has a semicircular seat in the support (1, provided with antifriction-rollers 10, which bear in a groove w of the cylinder.

In operation the longitudinal wings or flanges of the amalgam-plateact as conveyers, continually raising or elevating the pulp and delivering it againstthe plate at the opposite side, in this mannercontinually changing the position of the pulp and bringing it repeatedly in contact with the amalgamating-surfaces. The time of passage of the pulp through the cylinder, and consequently the number of contacts with the amalgamating-surface, is governed by the inclination of the barrel 0r cylinder, its discharge being further regulated by the plates F and G. The pulp being under the centrifugal action of the rotation will tend to hug the inner surface of the cylinder, and by turning the plate F so asto expose only the more central portions of the openings in the plate G it will be seen that the discharge will be retarded in proportion to the extent such openings are closed, not only on account of the reduced size of the openings, but owing to the fact that the pulp must be forced by accumulation against the centrifugal action.

The speed of rotation is usually about forty rotations per minute, but may be varied.

The effect of the electrogalvanic action on the amalgam-plate is to solidify floured mercury and increase the amalgamating properties in the treatment of certain kinds of ores, especially when the gold is coated with iron and other matter.

Having thus-described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an amalgamating machine, the combination with a rotatable, inclined amalgamating cylinder, of a discharge regulating plate in the lower portion of said cylinder, said plate comprising a central portion having a series of radiating wings one edge of each of which is curved, a second and parallel plate in close relation to said regulating plate and having a series of radial openings therein, a hollow axial extension on the second plate forming one of the journals of said cylinder, and a rod attached to the regulating cylinder and extending through said extension, substantially as specified.

2. An amalgamator, comprising a hollow inclined cylinder or barrel, rotatably supported, means for adjusting the inclination of said cylinder or barrel, an amalgamating inner lining, comprising a copper plate formed with a series of broad, longitudinal wings or flanges, a hopper arranged to discharge centrally into one end portion of said cylinder and whose spout forms one of the bearings for the cylinder, a discharging chamber at the lower end portion of said cylinder, provided with a series of peripheral discharges, an adjustable regulator for controlling the discharge into said chamber, and gear for rotating said cylinder or barrel, substantially as specified.

3. In an amalgamating machine, the inclined rotary cylinder having a metallic lining formed with a series of broad radial wings or flanges, a discharging chamber at the lower end of said cylinder having a series of peripheral discharges, and an adjustable regulator for controlling the discharge into said chamber, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER CARSON RUMBLE.

Witnesses:

O. OOONNOR, J OHN H. GILMORE. 

